Is a rent increase legal in Illinois?
No statewide rent cap. Rent Control Preemption Act bars local caps (repeal under debate). Chicago: 30-day notice for tenancies under 6 months, longer for established tenancies.
Check your situation
Where do you rent?
Local market context
How much can rent increase in Illinois?
Illinois does not currently impose a statewide cap on rent increases. That means landlords can generally raise rent by any amount when a lease ends, as long as they provide proper notice. However, individual cities may have local rent control ordinances — check your municipality's rules.
Notice requirements
Illinois requires landlords to give at least 30 days written notice before raising rent on a month-to-month tenant. For fixed-term leases, increases generally only take effect at renewal.
Source
Reviewed against 765 ILCS 825 (Rent Control Preemption Act) as of April 2026.
This page is educational and does not constitute legal advice. For your specific situation, consult a licensed attorney or local tenant rights organization.